Avramenko D. The method of forecasting of long durability of metallic materials of diferent classes on large service life

The dissertation is devoted to questions of forecasting of long-term strength of metal materials on the big service life. On the basis of the concept of base parities the regular analysis of the known and received data on long term strength of alloys is executed on the basis of iron, nickel, aluminum, titanium, niobium, tantalum, molybdenum and tungsten, including more than half of known data in the world about experiments by duration 100000 h and more. The interrelation between tilts of separate sites of diagrams of long durability in different temperature-strength areas loading metal materials is established and the new variant of a method of base diagrams for forecasting long-term strength is developed. For different classes of metal materials with the help of MBD-M the generalized parameters long-term rupture that may be directly used for the approached settlement estimation of long-term strength for the first time are established. The important advantages modified MBD are proved in comparison withparametrical methods widely used in the world. It is proved, that as opposed to the traditional forecasting long-term strength focused mainly on the account of the general patterns, basic development and substantial improvement of forecasting should be connected to additional regular consideration and the account of deviations from such patterns. The basic results of work have found industrial application at calculations of an individual resource of steam turbines, elements of designs of new engineering, and also for preparation of the specifications and technical documentation.